鸦胆子素D联合紫杉醇对胰腺癌Capan-2细胞增殖的抑制作用及机制研究 点击下载
论文标题: 鸦胆子素D联合紫杉醇对胰腺癌Capan-2细胞增殖的抑制作用及机制研究
英文标题:
中文摘要: 目的:探讨鸦胆子素D(BD)联合紫杉醇(Taxol)对人胰腺癌Capan-2细胞增殖的抑制作用及可能机制。方法:以Capan-2细胞为对象,采用磺酰罗丹明B法检测不同剂量BD(5、10、15、20 μmol/L)、Taxol(10、20、30、40 nmol/L)、BD+Taxol(5 μmol/L+10 nmol/L、10 μmol/L+20 nmol/L、15 μmol/L+30 nmol/L、20 μmol/L+40 nmol/L)作用48 h后的细胞增殖情况,并计算细胞存活率和药物合用指数(CI)。采用克隆形成试验检测BD(20 μmol/L,下同)、Taxol(40 nmol/L,下同)、BD+Taxol(20 μmol/L+40 nmol/L,下同)作用24 h后的细胞克隆集落形成情况,并计算克隆形成率;采用DAPI染色法观察BD、Taxol、BD+Taxol作用24 h后的细胞凋亡情况,采用Western blotting法检测的BD、Taxol、BD+Taxol作用后凋亡相关蛋白[Bcl-2、多聚二磷酸腺苷核糖聚合酶(PARP)、胱天蛋白酶3(Caspase-3)、切割胱天蛋白酶3(Cleaved-caspase-3);药物作用48 h]以及c-Jun氨基末端激酶(JNK)、磷酸化c-Jun氨基末端激酶(p-JNK)蛋白(药物作用4、6、12 h)的表达情况。结果:经10、15、20 μmol/L BD,20、30、40 nmol/L Taxol以及两药上述剂量联合作用48 h后,细胞的存活率均显著降低,且联用组显著低于BD、Taxol同剂量单药组(P<0.05),各联用组(BD 5   μmol/L+Taxol 10 nmol/L、BD 10 μmol/L+Taxol 20 nmol/L、BD 15 μmol/L+Taxol 30 nmol/L、BD 20 μmol/L+Taxol 40 nmol/L)的CI值分别为0.63±0.04、0.68±0.08、0.89±0.12、0.84±0.05。经20 μmol/L BD、40 nmol/L Taxol以及两药上述剂量联合作用后,细胞的克隆集落形成有所减少,并伴有不同程度的染色质浓聚和细胞核皱缩,细胞的克隆形成率(24 h)以及Bcl-2(48 h)、RAPR(48 h)、Caspase-3(48 h)、JNK(4、6 h,Taxol单药组除外)的相对表达量均显著降低,Cleaved-caspase-3(48 h)、p-JNK(4、6、12 h)的相对表达量均显著升高,且BD+Taxol联用组均显著优于同时间点BD、Taxol同剂量单药组[JNK(4、6、12 h)、p-JNK(4 h)除外](P<0.05或P<0.01)。结论:BD、Taxol均可抑制人胰腺癌Capan-2细胞的增殖并促进其凋亡,且两者联合具有一定的协同作用,效果优于任一药物单用。上述作用可能与激活Caspase通路以及JNK磷酸化等途径有关。
英文摘要: OBJECTIVE: To investigate the inhibitory effect and potential mechanism of Brucein D (BD) combined with Taxol on the proliferation of human pancreatic cancer Capan-2 cells. METHODS: Using Capan-2 cells as object, the proliferations after treated with BD (5, 10, 15, 20 μmol/L), Taxol (10, 20, 30, 40 nmol/L) and BD+Taxol (5 μmol/L+10 nmol/L, 10 μmol/L+20 nmol/L, 15 μmol/L+30 nmol/L, 20 μmol/L+40 nmol/L) for 48 h were determined by sulfonyl rhodamine B method. Survival rate of cells and combination index (CI) were calculated. The clone formation assay was performed to detect the formation of clonal colonies after treated with BD (20 μmol/L,hereinafter), Taxol (40 nmol/L,hereinafter)、BD+Taxol (20 μmol/L+40 nmol/L,hereinafter) for 24 h. The rate of clone formation was calculated. DAPI method was used to observe the apoptosis of cells after treated with BD, Taxol and BD+Taxol for 24 h. Western blotting was used to detect the expression of apoptosis-related protein (Bcl-2, PARP, Caspase-3, Cleaved-caspase-3) after treated by BD, Taxol, BD+Taxol for 48 h and the expression of JNK and p-JNK after treated by BD, Taxol, BD+Taxol for 4, 6, 12 h. RESULTS: After treated with 10, 15 and 20 μmol/L BD, 20, 30 and 40 nmol/L Taxol or two-drug combination for 48 h, survival rates of cells were decreased significantly; the survival rate of drug combination group was significantly lower than the same dose of BD group and Taxol group (P<0.05). CI values of drug combination groups (BD 5 μmol/L+Taxol 10 nmol/L, BD 10 μmol/L+Taxol 20 nmol/L, BD 15 μmol/L+Taxol 30 nmol/L, BD 20 μmol/L+Taxol 40 nmol/L) were 0.63±0.04, 0.68±0.08, 0.89±0.12 and 0.84±0.05. After treated with 20 μmol/L BD, 40 nmol/L Taxol and two-drug combination, the formation of clonal colonies was decreased with different degrees of chromatin concentration and nuclear shrinkage; the rate of clone formation (24 h), the expression of Bcl-2 (48 h), PARP (48 h), Caspase-3 (48 h) and JNK (4, 6 h, except for Taxol group) were decreased significantly, while the relative expression of Cleaved-caspase-3 (48 h) and p-JNK (4, 6, 12 h) were increased significantly. Those of BD+Taxol group were significantly better than those of BD group and Taxol group [except for JNK (4, 6, 12 h), p-JNK (4 h)] (P<0.05 or P<0.01). CONCLUSIONS: Both BD and Taxol can inhibit the proliferation and promote apoptosis of human pancreatic cancer Capan-2 cells, and the combination have a certain synergistic effect, which is better than any single drug. It may be associated with activating Caspase pathway and JNK phosphorylation.
期刊: 2019年第30卷第6期
作者: 黄玉玉,饶明君,谭笔琴,王慧铭,林能明
英文作者: HUANG Yuyu,RAO Mingjun,TAN Biqin,WANG Huiming,LIN Nengming
关键字: 鸦胆子素D;紫杉醇;人胰腺癌;Capan-2细胞;增殖;凋亡;胱天蛋白酶;c-Jun氨基末端激酶
KEYWORDS: Brucerin D; Taxol; Human pancreatic cancer; Capan-2 cells; Proliferation; Apoptosis; Caspase; JNK
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